Lithium battery and electrode

H - Electricity – 01 – M

Patent

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H01M 4/36 (2006.01) D01F 9/127 (2006.01) H01M 4/02 (2006.01) H01M 4/60 (2006.01) H01M 4/58 (2006.01)

Patent

CA 2326178

An electrode includes an electrically conductive matrix containing a disulfide group, wherein an S-S bond of the disulfide group is cleaved by electrochemical reduction and reformed by electrochemical oxidation. A plurality of carbon nanotubes are substantially disentangled and dispersed in the electrically conductive matrix. The electrode can be used as a cathode of a lithium battery. A method for producing disentangled carbon nanotubes includes the steps of: adding a plurality of aggregates of carbon nanotubes to a liquid; and providing sheer force (e.g. passing the liquid through a narrow gap at a high speed) onto the liquid for disentangling the aggregates of carbon nanotubes therein.

Electrode comprenant une matrice conductrice électriquement contenant un groupe disulfure dont une liaison S-S est divisée par réduction électrochimique et reconstituée par oxydation électrochimique. Une pluralité de nanotubes de carbone est pratiquement démêlée et dispersée dans la matrice conductrice électriquement. On peut mettre en application cette électrode en tant que cathode d'une batterie au lithium. Procédé servant à produire des nanotubes de carbone démêlés et consistant à ajouter une pluralité d'agrégats de nanotubes de carbone à un liquide et à exercer une force de cisaillement sur le liquide, par exemple, à faire passer ce liquide rapidement à travers un espace étroit, afin de démêler les agrégats de nanotubes de carbone contenus dans ce liquide.

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